Lamp-voltage regulator



W. A. TURBAYNE.

Patented Nov. 4, 1919.

2 SHEETS-SHEET I.

AAAAA/ /l//FW R MAM LAMP VOLMGE FEGULATOR. v E

.4K a A c mv A a E lz EP *E A SD value.`

. minimum.

i The mid pointe 14 and 16 may be chosen as desired but are illustrated as being" laced one-third of the length of the ypiles lstan't from the ends adjacent the 4yoke I0.

The 4solenoid '1 is adapted to control a bell crank lever22.l .The contacts 20-and 21 are mounted upon'said bell crank level; but are insulated therefrom and fromeach other. Said bell crank lever 22 is normally biased by a spring 23 to maintain contacts- 20 and 21 out of contaetwith their complementary contacts. Contacts 15 and19 are spaced in advance of -contacts 17 and 18, whereby,iwhen solenoid his energized to a predetermined degree, the bell crank lever 22 will be moved to cause the bridging of said. contacts 15 and 19. U on 'further `r determined excitation ofso enoid 7, the-,bell crank lever 22 will be .further moved to cause the bridging of` contacts 17 and V18, the

bridgingA of contacts 415 and 19 beingl also maintained.

A mode of operation of the embodiment of the present in :ention illustrated in Fi 1,' is substantially as follows: If no lamp load, or a lamp load of low valueis being used 1 .0066 ohms. ,Tommie-2 With a 50 amperelamp load, the E. F.

It will thus be apparent that a `greatly re duc'ed' voltage drop is produced under con ditions of heavy load bythe use of the present invention.;

`The modified system illustrated in Fi 2 the beu crank lever 22 -Winbe inA he 'Posiji will now be described. In FiV .`2,`the mec ation illustrated,` wherebybridgin contacts 20 and 21ers out of contact'withieir complementary contacts. Carbon piles 5 and' will be connected in series at this time... Upon 'any tendency of the voltage across thelampcircuit to vary from a. predetermined value, the solenoid-'8 will operate through bell crank lever `12 and' lever 11 to vary the resistance of said piles 5 and 6 to brin Asaid voltage back tothe desired en .a predetermined lamp load is being used, the solenoid 7 will be suli'iciently energized' to move' the bell V-crank lever against the tension ofthe spring 23, whereby contact 21 will Vbridge'contacts 15 and 19. .Circuit through the rheostat is thereby varied, whereby circuit may be traced from the conductor 1 through the pile 5 to mid-point14, to switch contacts 15, 21, 19, through solenoid 7, 15o-conductor Q 2. The effective resistance-of the rheostat is thereby materially reduced. Upona further lamp load of a pledetermmed value being taken, solenoid 7 will move 'bell crank lever 22 to cause'v the brid of contacts 17 and 18.` At this time' parallel circuits through piles 5 and 6 are provided whereby, for any given stage of compresl sion, the resistance of the rheostatv will be a By referri to Figs.` 3 a d 4, thechange in the circuiti thro-ugh th? pilesv 5 'and 6' will be made more apparent. For the purpose of illustration, each ofthe piles 5 and 6"has been arbitrarily given a resistance value, under maximum compression, of .03. of an ohm, which is valvalue chosen .from practice. Under the 4conditions illustrated nism operated by solenoids and 8 is the same as that illustrated in Fig. l. However, the connections of the iles 5 and 6 are slightly different. In ig. 24 a midpoint 24 o f the iles is connectedto a similarly placed mitlpoint 25 of the pile 6. Also a mid-point 26 of the pile 5I is'connectedto a similarly' placed mid-point 27 of the pile 6. Adjacent ends of the piles 5 and 46 are conunected together. The end of the pile 5 adjacent vthe yoke 10 is connected to the conductor' 1 and to the contact 18. The end of -the pile 6 distant from the yoke 10 is connected to the solenoid 7 and to' the contact 19. Mid-points 72,6 and 27 are connected `through a low resistance conductor to the contact 15. Mid-points 24 and 25 are con- 11'e ':tedthrough Aa low resistance conductor to the contact 17.

Beforethe contact 21, has beenY moved to contact-makin position,` the iles 5 and 6 will be'connec `in parallel. the resistance'ofV the re lator under maximum pressure maybe t e same as the regun order 'that lator lllustrated in Fig.' 1,-each of the sections into which the mid-points'24, 25d 26 and lv27 divide 4the piles, may `be .given a resistance' of .04 of an ohm under maximum pressure. `Before the contact 21 has'been moved ',to contact; making position, ytherefore, the total resistance of the rheostat will be .06 ohms. With'a 50 ampere lamp load the voltage drop would be- E=.06X50=3 Volts.

According to 'the present invention, however, after contact 21 has been moved to contact-making position, circuit A may .be

uns

traced from conductor-f1 to conductor 2 through two parallel paths, to wit, from conductor l through piles and 6 in parallel thus he materially reduced. After both contacts 2O and 2l have heen moved to contact-making position, 11x parallel paths various elementswill be connected in circuit as illustrated either-in Fig. 1 or Fig. 2. One embodiment of the resent invention has been described in detall. Many modifications will occurl to those skilled in the art. It is intended that this patent shall cover all such modifications that come within the scope of the invention as defined by the appended claims.

What I claim as neur and desire to secure by Letters Patent of the United States is- `1. In regulating imanes, in combination, a compressible rheostat comprising a pluoperating therewith, and load responsive means for varying the number of circuits throu h said plates.

2. lgn combination, electric mains, a trans- 60 said translation circuit including a compressible rheostat comprising a plurality ot lates inbseries, said translation circuit also including electro-magnetic means for varying the current paths through said plates in SucceSSve steps.

rality of plates in series, pressure mea-ns co.

lation circuit connected across said mains,

-to mid-points 26 and 27 tocontacts 15, 21 through Ypilcsh and 6 will lie provided. 10 5 and 19 through solenoid 7 to conductor 2. wherein' the resistance of the regulator The effectiveV resistanceof the rheostat will under maximum compression will be4 3:17174. 14.1 1 l F 1 .ooee ohms.

With a 50 ampere lamp load, the voltage 3. In combi nation. electric mains, a transdrop will be- `latipn ciriluit connected across said mains,

sait trans` ation circuit includinor a com )res- E 'Q066-X50-'34v01t5 `sililc rlicostat comprising a iiluraliti of 70 The progressive switching action of conplates in series, .switching means connected tacts Vand 2'1 will insure that flickering to intermediate points of said rhcostat, and of the lamps Wili not occur. means responsive to the current in said cir- 20 It will befobvious that thernumber of cuit for operating said switchingr means to divisions into Whichthe iles 5 and 6 are vary thc current paths through said plates. 75 divided may be increased) as much as de 4. ln combination, in a translation cirsired, to increase the number of parallel cuit, a pair of compressihlvy piles, cach paths through the piles. adapted to provide a single operativ(l path Fig. 6 'represents a modified switching for current throughout its length, and

Ineclianism which may be used in either of means responsive to the `current flowing in 80 the arrangements illustrated in Figs. 1 and said circuit i'or providing parallel paths 2. In this modified mechanism, two solethrough cach ot' said piles. noids 7 and 7b are used instead of the single in regulating means. in combination,

solenoid 7. Solenoid 7F controls the bell a compressible rheostat comprising a plucrank vlever 22?*,while solenoid 7b controls rality of plates in series, pressure means co- 85 bell crank levers 22x.V Lever 22 carries coloperating therewith, and load responsive tact 21,l adapted to bridge contacts 15 and .means Jfor progressively varying the num- 19, while lever 22lrcarries contact-20. Levers loer of circuits through said plates.

'3'5 22a and 22 are, held out of contact-making 6. In combination, electric mains, a transpositionb `the sp1-in '23" and 23b respeclation circuit connected across said mains, 90 tively. urrent in t e translation circuit said translation circuit including a compres Vwill divide through. solenoids 7" and 7". sible rheostat comprising a plurality of By adjusting the tension Vof springs 233a and lates in series, said translation circuit also 40 23", the proper sequence vof action of switch lncluding electro-magnetic means for procontacts v20 and 21 may be secured. The grcssively varying the current paths 95 through said plates.

7. In combination, electric mains, a translation circuit connected across said mains, Said translation circuit including a compres- ,sible rheostat comprising a plurality of plates in series, switching means connected to intermediate points of said rheostat, and means responsive to the current in said circuit for operating said switching means to progressively `vary the current paths throu h said plates. I

8. n combination, in electric regulating means, a compressible rheostat comprising a plurality of plates in series, compression means for operating' same, and means op 110 erativeindependentlyof said compression means for progressively varying the net resistance of said rheostat through said plates.

9. In combination, a circuit to he regulated, a compressible rheostat in said circuit comprising a plurality of plates in series, voltage responsive means for operating said rheostat, a. plurality of switching means connected to intermediate points of said rheostat, and means responsive to the current flowin in said circuit for progressively closing sal switching means.

10. In comblestimo,y a translation e1'rcu1t,

a compressible rheostet comprisin Y a plu` 'mhty of plates in series, means or compressir said rheostat to reduce the resistance o same, and means responsive to the current flow through said eircuit for progressively reducing the resistance through said rheostat independently of said voltage responsive means.

11. In combination, a translation circuit, a compressible rheostat comprisin a, plurality of plates in series, means or oompressing said rheostet to reduce the resist- Lseoes responsive to the current How lthrough said gressively pistes. t

12. In oombinatiomin a circuit to be regulated, s eompressible pile having a piu' rality of resistance elements arranged in seriesv means responsive to' the voltage across saici circuit for operat means responsive to the ad on said circuit for forming a short oircuit through 'certain ofisaid elements. Y

In witness whereof, Lhave hereunto subscribed my name.

WILLIAM A. TURBAYNE.

said rheostat, and Y varying the circuit through said 

